本文選題：厭氧　切入點：生物電化學　出處：《哈爾濱工業(yè)大學》2015年碩士論文　論文類型：學位論文

【摘要】：偶氮染料廢水具有色度高、成分復雜、排放量大、可生化性差等特點,屬于難降解的工業(yè)廢水,其中所含物質(zhì)多數(shù)致畸、致癌、致突變,排放到環(huán)境中會對生態(tài)系統(tǒng)以及人類的健康生存造成嚴重威脅。目前傳統(tǒng)的處理偶氮染料廢水的工藝多為物理化學法以及生物法等工藝,但這些傳統(tǒng)的工藝存在種種弊端,因此我們考慮將生物電化學方法與傳統(tǒng)的生物處理法相結(jié)合,以達到在高效處理偶氮染料廢水的目的。本研究選取的偶氮染料為茜素黃R(AYR),首先研究無隔膜生物電化學系統(tǒng)對偶氮染料的處理效能,考察AYR濃度以及外加電壓對染料脫色效能的影響,同時分析AYR對陽極性能的影響。結(jié)果表明,無隔膜生物電化學系統(tǒng)對偶氮染料的脫色效能受偶氮染料初始濃度以及外加電壓的影響,AYR濃度為75mg/L時,該系統(tǒng)裝置的脫色效能最高;外加電壓(閉路)能夠促進無隔膜生物電化學系統(tǒng)對偶氮染料的脫色,同時還能維持陽極電活性生物膜的活性,使反應器效能穩(wěn)定;同時偶氮染料對無隔膜生物電化學系統(tǒng)陽極性能的影響與脫色效能的影響規(guī)律相一致。在此基礎上,為了保持生物陽極的活性及穩(wěn)定性,促進陰極能夠更好的發(fā)揮偶氮染料脫色的功能,本研究開發(fā)構(gòu)建了30L放大規(guī)模的套筒型厭氧-生物電化學耦合裝置(AD-BES),將生物電化學系統(tǒng)置于厭氧污泥床上部,同時,陽極置于陰極中間,以陰離子交換膜隔開,厭氧污泥區(qū)與陰極區(qū)聯(lián)通,陽極單獨控制,生物電化學區(qū)有兩組電極(1#和2#)構(gòu)成,利用該裝置處理偶氮染料廢水,分別在間歇性進水和連續(xù)進水狀態(tài)下運行,結(jié)果表明,AD-BES系統(tǒng)在HRT=12h,進水偶氮染料負荷為140g/m3 d時,對偶氮染料AYR的脫色率最大達到93.2±2.2%,明顯高于單純的厭氧AD工藝(85.1±0.7%),AD-BES對偶氮染料的最大去除速率達到264 g/m3 d,其中,生物電化學系統(tǒng)的引入促進了厭氧生物工藝對染料進一步去除,其偶氮染料去除的貢獻率最大為10.5%,電化學模塊的加入也增強了該裝置對COD的去除效能,本研究證實了放大化的厭氧-生物電化學耦合工藝的有效可行性。
[Abstract]:Azo dye wastewater has the characteristics of high chromaticity, complex composition, large discharge, poor biodegradability and so on. It belongs to industrial wastewater which is difficult to degrade. Most of the substances contained therein are teratogenic, carcinogenic and mutagenic. Discharge into the environment will pose a serious threat to the ecosystem and the healthy survival of human beings. At present, most of the traditional processes for treating azo dye wastewater are physicochemical and biological processes, but these traditional processes have many disadvantages. So we're thinking about combining bioelectrochemistry with traditional bioprocessing, In order to deal with azo dye wastewater efficiently, the azo dye was selected as alizarin yellow AYRN in this study. Firstly, the bioelectrochemical system without membrane was used to treat azo dye. The effects of AYR concentration and applied voltage on the decolorization efficiency of dyes were investigated, and the effects of AYR on the anode properties were analyzed. The decolorization efficiency of the system was the highest when the concentration of AYR was 75 mg / L, and the effect of the initial concentration and applied voltage of the azo dye on the decolorization efficiency of the system was the highest. The applied voltage (closed circuit) can promote the decolorization of azo dyes by non-diaphragm bioelectrochemical system, and maintain the activity of anodic electroactive biofilm, so that the reactor efficiency is stable. At the same time, the effect of azo dyes on anode performance of non-diaphragm bioelectrochemical system is consistent with the effect of decolorization efficiency. On this basis, in order to maintain the activity and stability of biological anode, In order to promote the cathode to play a better role in the decolorization of azo dyes, a 30L jacket anaerobic-bioelectrochemical coupling device (AD-BESN) was developed, which placed the bioelectrochemical system on the upper part of the anaerobic sludge bed. The anode is placed in the middle of the cathode, separated by anion exchange membrane, the anaerobic sludge area is connected with the cathode area, the anode is controlled separately, and the bioelectrochemical zone is composed of two groups of electrodes, I. e., the anion exchange membrane, the anion exchange membrane, and the anode. The results show that the AD-BES system has an azo dye loading of 140 g / m ~ 3 / d at HRT for 12 h. The maximum decolorization rate of azo dye AYR was 93.2 鹵2.2, which was significantly higher than that of pure anaerobic AD process (85.1 鹵0.7g / m ~ 3). The maximum removal rate of azo dyes was 264g / m ~ 3 / d by AD-BES. The introduction of bioelectrochemical system promoted the further removal of azo dyes by anaerobic bioprocess. The maximum contribution rate of azo dye removal was 10.5, and the efficiency of COD removal was enhanced by the addition of electrochemical module. This study confirmed the feasibility of the amplified anaerobic bioelectrochemical coupling process.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：X791

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相關(guān)期刊論文 前1條

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本文編號：1615241